A compression joint without a separate cutting ring: the profile ring is cold formed into the tube on a Walform machine, a Viton seal sits on it, then the union nut. Rated to 800 bar (S series) and 500 bar (L series) — mates with DIN 2353 metric fittings.
State the tube OD & wall, series (L/S), the DIN 2353 fitting thread it lands on, and quantity/lengths — quotes back within 2 working hours.
| Standard | DIN EN ISO 8434-1 |
|---|---|
| Range | 6 – 42 mm OD · wall 1 – 6 mm |
| Pressure | 250 – 800 bar, by series & size |
| Material | Carbon steel ST37.4 NBK (DIN 2391) · stainless 1.4571 / SS316 |
| Seal | Viton (fluorocarbon) — re-usable joint, the seal is the consumable |
| Mating fittings | DIN 2353 metric — the union nut goes on before forming |
Full part number and dimension tables are on this page and in the catalogue, as printed.
| At a glance | L series | S series |
|---|---|---|
| Max pressure | 500 bar (6–10 mm) | 800 bar (6–10 mm) |
| Character | Standard wall | Heavy-duty |
| 6 mm thread | M12 × 1.5 | M14 × 1.5 |
Simple, practical assembly that needs less skill than a cutting-ring joint made up by feel; fewer components means less to leak — no separate ring to omit, damage or install backwards.
Reliable tube retention that keeps working under high dynamic loads; consistent quality across every joint because the machine forms the ring, not the fitter. Cheaper maintenance — the seal is the consumable, not the joint.
L series 500 / 400 / 250 bar
| Tube OD | Type | Reference | Weight (kg/100) | Thread | Pressure | Seal (ref) |
|---|---|---|---|---|---|---|
| 6 mm | M6L | WAL 039842 | 0.9 | M12 × 1.5 | 500 bar | WF-WD 6L/S VI · WAL 610871 |
| 8 mm | M8L | WAL 039843 | 1.4 | M14 × 1.5 | 500 bar | WF-WD 8L/S VI · WAL 610872 |
| 10 mm | M10L | WAL 039844 | 2.0 | M16 × 1.5 | 500 bar | WF-WD 10L/S VI · WAL 610873 |
| 12 mm | M12L | WAL 039845 | 2.5 | M18 × 1.5 | 400 bar | WF-WD 12L/S VI · WAL 610874 |
| 15 mm | M15L | WAL 039846 | 4.0 | M22 × 1.5 | 400 bar | WF-WD 15L/S VI · WAL 610875 |
| 18 mm | M18L | WAL 039847 | 6.0 | M26 × 1.5 | 400 bar | WF-WD 18L/S VI · WAL 610877 |
| 22 mm | M22L | WAL 039848 | 8.0 | M30 × 2 | 250 bar | WF-WD 22L/S VI · WAL 610879 |
| 28 mm | M28L | WAL 039849 | 8.5 | M36 × 2 | 250 bar | WF-WD 28L/S VI · WAL 610881 |
| 35 mm | M35L | WAL 039850 | 13.0 | M45 × 2 | 250 bar | WF-WD 35L/S VI · WAL 610883 |
| 42 mm | M42L | WAL 039851 | 21.0 | M52 × 2 | 250 bar | WF-WD 42L/S VI · WAL 610885 |
S series 800 / 630 / 420 bar
| Tube OD | Type | Reference | Weight (kg/100) | Thread | Pressure | Seal (ref) |
|---|---|---|---|---|---|---|
| 6 mm | M6S | WAL 039652 | 1.5 | M14 × 1.5 | 800 bar | WF-WD 6L/S VI · WAL 610871 |
| 8 mm | M8S | WAL 039653 | 1.7 | M16 × 1.5 | 800 bar | WF-WD 8L/S VI · WAL 610872 |
| 10 mm | M10S | WAL 039654 | 3.0 | M18 × 1.5 | 800 bar | WF-WD 10L/S VI · WAL 610873 |
| 12 mm | M12S | WAL 039855 | 3.5 | M20 × 1.5 | 630 bar | WF-WD 12L/S VI · WAL 610874 |
| 16 mm | M16S | WAL 039857 | 6.0 | M24 × 1.5 | 630 bar | WF-WD 16S VI · WAL 610876 |
| 20 mm | M20S | WAL 039858 | 9.5 | M30 × 2 | 420 bar | WF-WD 20S VI · WAL 610878 |
| 25 mm | M25S | WAL 039859 | 19.5 | M36 × 2 | 420 bar | WF-WD 25S VI · WAL 610880 |
| 30 mm | M30S | WAL 039860 | 21.5 | M42 × 2 | 420 bar | WF-WD 30S VI · WAL 610882 |
| 38 mm | M38S | WAL 039861 | 31.0 | M52 × 2 | 420 bar | WF-WD 38S VI · WAL 610884 |
Three systems in the Walterscheid family: Walpro = two-edged metallic cutting ring, ~25% torque reduction, 30–60° tightening travel; Walring = cutting ring with a captive elastomeric soft seal; Walformplus = the machine-formed tube end (this page) — just three components, one sealing point, far shorter tightening time.
Saw the end square — never use a tube cutter or cutting-off wheel.
Deburr inside and out; remove paint from the clamping and reshaping area.
Clean the tube end to bare metal; check for damage and spalling.
The OD marked on clamping jaw & reshaper matches the tube; the clamping surface is oil-free (no slipping) and chip-free (correct clamping).
Forming on the machine outline · M-WF385Xplus / M-R7
Switch on · press “change tool” · fit the clamping jaw & hand-tighten the reshaper screw · close the holder · hold “start and function” ~2 s until the white lamp shows.
Union nut on the tube first · insert the tube horizontally to the stop · hold tight, press start (the cycle cannot be interrupted) · pull out, check for cracks · record the control diameter.
M-WF385Xplus: compact, quiet, colour-coded tooling. M-R7: RFID tool detection, automatic assembly, also runs Walpro & Walring. Both cover 6–42 mm.
Dimensions and part numbers are in the catalogues, as printed; stock and price are not — send the list and we confirm both.
A compression-joint tube connection from the Eaton Walterscheid fitting series — the profile ring is cold formed into the tube itself on a Walform machine, rather than being a separate cutting ring pressed onto the outside. To DIN EN ISO 8434-1, 6–42 mm OD.
Ordinary tube — it is the end that is special. Carbon steel: type NBK, material ST37.4 to DIN 2391; stainless: grade 1.4571 or SS316, cold drawn seamless, scale-free heat treated. It must suit cold bending and flaring; EN 10204 3.1 certificates come from the parent tube supplier.
Up to 800 bar on 6–10 mm in the S series, and 500 bar in the L series. The rating falls as diameter rises — the full tables are above.
Wall thickness, and therefore pressure — S is the heavy-duty series. At the same diameter the thread differs too: 6 mm L takes M12 × 1.5, 6 mm S takes M14 × 1.5.
DIN 2353 metric fittings, which we stock as compression fittings. The union nut goes on before forming — it cannot be fitted afterwards.
Fewer things can go wrong: simpler assembly needing less skill, fewer components so less to leak, reliable retention under high dynamic loads, and consistent quality because the machine forms the ring.
Yes — formed from grade 1.4571 or SS316 tube, cold drawn seamless and scale-free heat treated.
To form it, yes — but you do not have to own one: we can form tube for you when the volume does not justify ownership. Tooling is size specific: each OD needs its matching clamping jaw and reshaper.
Yes — the profile ring is part of the tube wall, so breaking the joint does not consume it. The Viton seal is the consumable, not the joint.
A fluorocarbon elastomer — it withstands dynamic pressure impulse and vibration while compressed between two steel faces, and resists hydraulic oils and temperatures. The seal is what makes a steel-to-steel joint leak free.
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